Stop mechanism.



J. F. HITCHCOCK.

sToP MEcHANlswl. 'APPLICATION FILED MAB.. 19. 1917.

Pavtmd May 28,19%.

SHEETS-SHEET L -lllllll l!! 2@ J ,www M MM@ 056/ J. F. HITCHCOCK. soP MEcHAmsrw. l APPLICATION FILED MAR. I9, ISI]- l MMUM Patented May 28,1918.

' @am NORA/fzs J. F. HITCHCOCK.

soP mEcHAmsnw. h Y AP-ICATON FILED MA". I9, 9.11. 1M @MM@ Pmented May 28, i918.

4 SHEETS-'SHEET a.

als Arron/11H45 '.l. F. HITCHCOCK.

STOP MECHANISIVI. APPLlCATION FILED MAR. I9, 1917.

4 SHEETS-SHEET 4.

Patented May m Amm/m5 'oni-iran stranieri an lannion@ JOSEPH Il?. HITCHCOCK, F ROCHESTER, NEW YORK.

STOP MECHNIS'M.

To all whom it may concern.'

Be it known that l, JOSEPH F. Hrrcrrcocn,

of Rochester, in the county of Monroe and State ot New York, have invented. certain new and useful Improvements yin Stop lllechanisms; and l do hereby declare the following to be a full, clear, and 'exact description of the same, reference being had to the accompanying drawings, formm a part of this speciiication, and to the re erence characters marked thereon. e

lily invention has for its object to adord a structure for sound reproducing machines, with more particular reference to mechanisms of the disk or fiat record type and the speciic purpose of my improvement is to provide for automatically bringing the record to a standstill at any predetermined. point in its operation. In a. more articular aspect my invention is designed with a View to employing the fewest possible number of parts, and so inter-relating them that the mechanism can be instantly'and readily set to stop the machine precisely at the end of the reproducing part of thel record, or at' any intermediate point in theyplaying of the record. To these and other ends the invention consists in certain improvements and con'ibinations of parts, all as will be hereinatter more fully described, the novel fea` tures vbeing pointed out in the claims at the end of the specification.

ln the drawings: .i C Figure 1 is a plan View showing the application of my improvements to a conventional type ot sound reproducing machine; Fig. 2 is au enlarged bottom plan view ot the stop mechanism with the parts in the position they assume when the brake is applied;

Fig'. 3 is a similar view with the parts in the position they assume when the brake is released Fig. 4- is a similar view showing the position ot the parts while being adjusted, when the controlling arm vis free 'for movement to any position of the tone arm;

Fig. 5 is a side elevation of the parts illustrated in Fig. 3;

F i if. (i is a sectional view on the line @aM-(ia ot' Fig. 3;

Fig. 7 is an enlarged bottom plan view of a. modified form, showing the Abrake applied;

Fig. 8 is a similar view with the brake released;

peciilcation of Letters Patent.

Application filed March 19, 1917.

Patented May 28, 191th serial No. 155,681.

Fig. 9 is a vievv similar to Fig. 7 with the parts differently adjusted;

Fig. 10 is a view similar to Fig. 8 'With the parts adjusted as in Fig. 9;

Fig. 11 is a plan view of the adjustingl means for timing the release, and

Fig. 12 is a sectional View on line 12-12 of Fig. 11. y

Similar reference characters throughout the several views indicate the same parts.

The invention may be carried out in a variety of ways, being applicable not only tothe various types of spring motor and other mechanically driven types, but also to electrically driven machines as Well, where it is desirable to stop operation of the motor at any instant, and by Way of illustration l have shown one "adaptation of my i1nprovernents practically as applied to a dislr record type of apparatus. 1 designates the usual table or rotary support, vvhile 2' is a.'

irecord arranged thereon and 3, the swing# be otherwise movably mounted so as to permit it tobe withdrawn Jfrom braking -position to its released position .las indicated in Fig. 3. The brake lever 7 is provided with a notch or shoulder 9 with which cooperates..

a retaininglatch 10 that is pivotally mounted at 11, and 12 is a spring,r connecting the outer end of the brake lever With the latch 1.0 and tending to move said parts normally to the position shown in Fig. 2, Where the brake lever is in engagement with the record table or support and the latch is in. engagement with the brake lever. Movement of the latch in the opposite direction is prevented by the stationary pin or stop 12". 13 is a setting lever mounted co-axially with reference to the brake lever 7 and arranged when moved to the left of Fig. 2 to engage a flange or projection 1l on the brake lever and move the. latter to the position shown in Fig. 3, or until the latch 10 engages over the notch or shoulder 9 to retain the brake lever in released lposition. Connected to the latch 10 is a link 14 which is in turn connected, to the inner end of a controllingr arm 15, While the latter is pivotally mounted at 16 upon a suitable carrier 17 that is also pivot-ally mounted upon the base upon an. axis that coincides with the axis 18 when the parts are in the position of `Fig. 2, so that the arm can be adjusted Without changing the position of the latch, and at the same time permitting movement of the latch to vary the position of the arm. The several parts of the stop mechanism already described as well as those which are to be set forth later are mounted upon a base plate 19 which is suitably attached to the top of the frame 20 underneath the rotary table as shown in Fig. 1. 22 designates a spring having one end connected to a post 23 and its opposite end to the carrier 17 and actn ing with a tendency to move the latter to the right from the posi-tion shown in Fig. 2, when released as indicated in Fig. The carrier 17 is normally held against any such movement, and to this end it is provided with a concentric gripping surface 24 which cooperates with a'friction lock 25. The latter is preferably in the form of a lever pivotcd about the axis 23 and having a curved surface 26 which frictionally en gages the aforementioned gripping surface on the carrier. Friction lock Q5 is slotted at 27 for engagement with a pin or projection 28 which limits its movement in opposite directions and 29 is a leaf spring enga ging the outer end of the friction lock and acting to move the .latter normally into gripping relation with the carrier as shown in Fig. 2. lThe friction lock is moved against the action of the spring in order to release the carrier 17, by the setting lever 13 which is moved to the right from the position shown in Fig. 2. `With such operation vthe inner end or tail portion 30 of the setting lever engages the adjacent surface il of the friction lock causing the latter to swing inwardly about its axis 23 as shown in Fig. 4f. rThis releases the friction lock from engagement with the carrier 17 permitting the latter and also the controlling arm 15 to swing to the right under the action of the spring 2Q. After the parts are set to their respective positions, as shown for instance in Fig. 3, if the outer end of the controlling arm is moved to the left of said ligure, the latch 1t) is swung to the right permitting the brake lever to move the brake into engagement with the record table.

The operation of the mechanism may be described briefly as follows: Starting with the parts in the position shown in Fig. 2, upon placing a record upon the table, the toneI arm is adjusted manually to the end of the playing portion of the record. The setting lever 13 is then moved te the right with reference to Fig. 52, causing the friction lock to move 'away from the carrier 17, after which the sjiring 22 actuates the carrier 17 and the cmitrolling arm 15 to the right with ,is in engagement with the stop or .controlled instrun'lent by arranging for Leashes reference to Fig. 2 until the controlling arm projection 4 on the tone arm. The brake is then released by throwing the setting lever i3 to the left of the position shown in Fig. 2, actuating the brake lever to the position shown in Fig. 3 where it is getained by the latch 10, and the slight movement of latch 10 necessary to engage the brake lever, causes a corresponding slight movement of the arm 15, so that the latter will be engaged slightly in advance of the position to which it is preliminarily set, and thus insures stopping the mechanism, by withdrawing the latch fully, when playing of the record is completed. The tone arm is then set to starting position and the operation of the machine commerical. V/lien the toxic arm, in its progress over the record, shall have nearly reached the predetermined position of adjustment, its projection #l engages the controlling arm 15 and moves the latter to the left with reference to Fig. 3, that is to say, the outer end of the' tone arm is moved to thc left about the axis 16. This causes the latch 10 to be swung away from the, brake lever as shown inFig. 2, until it entirely disengages the shoulder 9, entirely releasing the brake lever which is thereupmi forced into engagement with the rotary table by the spring 12. This same latch niechanism and arrangement of controlling arm may likewise be applied to an electrically governing the electric circuit through the movements or" the latch. It is sometimes desirable to provide for stopping the record. either in advance of or after the end of the playing portion reached, and to accon1- plish this, I afford an adjusting means for varying the relation of the initial position to which the controlling arm is set with the position at which the record is stopped, or in other words, varying the additional movement or overthrow of the controlling arm, subsequently to its initial setting7 which is caused by movement of latch l0 into locking engagement with the brake lever. This is accomplished by an adjustable member or plate 40 mounted on brake lever 7, in Figs. 7 to l2 inclusive. is adjustable by a slot 41 and screw -12 and carries a projection or end portion I3 which engages the latch 10, when adjusted outwardly, as shown in ligs. 7 and 8. rlhe brake lever 7 is eut away to atl-'ord a recess 44., into which the latch l() projects, when the adjustable plate 10 is moved inwardly as shown in Figs. S) and 10. Assuming the plate et() to be adjusted as in Figs. 7 and 8, and that the arm l5 has been adjusted against the tone arm projection 1, when the setting lever is moved to release the brake lever as shown in Fig. 8, the controlling arm moves from the position shown in dotted as secu 'lhe member "l0 lines to that shown in full lines. This causes the arm l5 to be engaged by the tone arm projection It early with reference to the end of the playing portion, or in advance of the end of the playing portion. By adjusting theparts as shown in Figs. 9 and lO with the plate 40 Withdrawn, the overthrow of the eontrollinfr arm when the latter is engaged with the brake lever, is slight, as indicated by the dotted and full lines of the projection flin Fig. l0, so that stopping of the record, with reference to the end of its playing portion is delayed or retarded. Thus, by adjusting the plate ll0 outwardly, the stopping operation is made earlier, with reference to the selected position of the tone arm on the record, and by adjusting the plate 40 inwardly, the stopping operation is delayed. In the modified arrangement of the figures just described, the brake lever and latch are actuated by separate springs 45 and 46 respectively.

I claim as my invention:

l. ln a stop mechanism for sound reproducing apparatus, the combination with a brake and movable brake lever, of a movable retaining latch arranged to coperate with the brake, an adjustable spring actuated controlling arm connected to the latch, a friction lock acting to hold the controlling arm in adjusted position, and a setting lever operatively associated with the brake lever and the friction lock and acting both to release the friction lock and to move the brake lever to released position.

2. In. a stop mechanism for sound 'reproducing apparatus, the combination with a brake and movable brake lever, of a movable retaining latch arranged to cooperate with the brake lever, an adjustable spring actuated controlling arm connected to the latch, a friction .lock acting to hold the controlling arm in adjusted position, and a setting lever operatively associated with the brake lever and the friction lock and affording means for alternately releasing the friction lock and moving the brake lever to released position.

f5. In a stop mechanism for sound reproducing apparatus.' the combination With a brake and movable brake lever, of a movable retaining latch arranged to coperate with the brake lever, an adjustable spring actuated controlling arm connected to the latch and adjustable without changing the position of the latch, a Jfriction lock acting to hold the ctmtrolling arm in adjusted position and a setting lever operatively associated with the brake lever and the friction lool; and affording means for alternately releasing the friction lock and moving the brake lever to released position.

ft. ln a stop mechanism for sound reproduring apparatus the combination with a brake and movable brake lever, of a movable retaining lat-ch arranged to coperate with the brake lever, an adjustable spring .actuated controlling arm connected to the latch and adjustable Without changing the position of the latch, a friction lock acting to hold the controlling arm in adjusted position and a setting lever operating when moved in one. direction to release the friction loclr and when moved in the opposite direction to move the brake lever to released position where it is engaged by the latch.

5. In a stop mechanism for sound reproducing apparatus, the combination with a brake and movable brake lever, of a movable retaining latch arranged to cooperate with the brake lever, a spring actuated pivoted carrier having a gripping surface, a spring actuated arm pivotally mounted on tie carrier and connected to said latch, a spring controlled movable friction lock having a curved surface engaging said gripping surface on the carrier, and a movable setting lever acting when moved in' one direction to engage and move the friction lock and when oppositely moved,'to engage and effect movement of the brake lever.

6. In a stop mechanism for sound reproducing apparatus` the combination With a brake and pivoted brake lever, of a pivotedretaining latch arranged to engage and hold the brake lever in released position, a spring actuated pivoted carrier having a concentric gripping surface, a spring actuated arm pivotally mounted on the carrier, a link connecting said arm and said latch. a spring controlled pivotedV friction lock having a, curved surface adapted to frictionally cngage said concentric surface on the carrier to hold it against movement, a setting lever pivoted coaxially of the brake lever and movable into engagement with the free end of the friction lock. and a projection on the brake lever located in the path of the setting lever when the latter is moved in the opposite direction to the friction lock.

7. In a stop mechanism for sound reproducing apparatus, the combination with a movable latch, an adjustable spring actuated controlling arm connected to the retaining latch, a friction lock acting to hold the controlling arm in adjusted position and a setting lever operatively associated with the friction lock.

8. In a stop mechanism for sound reproducing apparatus, the combination with a movable latch. of an adjustable spring actuated controlling arm connected to the latch,

and adjustable without changing the position of thelatch, a friction lock acting to hold the controlling arm in adjusted position, and a setting lever operatively associated With the friction lock. l

'9. ltn a stop mechanism for sound-rcproducing apparatus, the combination with a.

een

' pivoted latch, of a spring actuated carrier having a concentric gripping surface, a spring actuated arm pivotally mounted on the carrier, a connection between Said arm and said latch, a spring controlled pivoted friction lock having a curved surface adapted to frietionally engage said concentric surfaceon the carrier to hold it against movement, and a setting lever movable into engagement with the free end of the friction lock.

l0. n a stop mechanism for sound reproducing apparatus, the combination with a Lacepoe brake and movable brake lever, of a movable retaining latch cooperating with the brake lever, an adjustable member on the brake lever eoperating with the latch to vary the position thereof when the brake lever is released, an adjustable spring actuated controlling arm connected to the latch and having its position controlled thereby, and a lock governing the adjustable controlling' arm and acting to hohl it in adjusted position.

JOSEPH F. HITCHCOCK. 

